In-line measurement apparatus for residence time distribution in twin-screw extruder and its application in polymer processing

摘要

Residence time distribution (RTD) in twin-screw extruder is an important parameter for polymer processing. This work developed an improved apparatus for inline measurement of RTD in twin-screw extruder (TSE). The apparatus possessed many important advantages over those reported in the literatures. An important characteristic of the improved apparatus is to provide the possibility of calculating the local RTD because it allowed to simultaneously measuring RTDs at any two different locations of an extruder. Another significant application is to construct emulsification curves of polymer blend process in TSE by combining the concept of compatibilizer-rracer so that makes it possible for selecting most appropriate compatibilizers under real industrial polymer blending conditions as well as scaling up and optimizing blending processes.